I had an issue with the carpet in my 64 Valiant and posted a thread about best thing to do.
Here is thread.
http://www.forabodiesonly.com/mopar/showthread.php?t=279886
I was going to buy a new one as I felt the old one was too far gone as it had dried cement all over it from some product that was used on the shifter area. 66Dvert recommended I try a good carpet dye and a power washer first. Glad I listened. It turned out great and cost very little.
BEFORE
http://i62.photobucket.com/albums/h94/kmrumedy/imagejpg4_zps0ee95f89.jpg
AFTER
http://i62.photobucket.com/albums/h94/kmrumedy/imagejpg1_zps0cd1f6da.jpg
Thanks 66Dvert you saved me a good chunk of change.